Update some broken links (#817)

Co-authored-by: Yaron Schneider <yaronsc@microsoft.com>

FAQ.md

@@ -31,7 +31,7 @@ Istio is not a programming model and does not focus on application level feature
 ### Relationship between Dapr, Orleans and Service Fabric Reliable Actors
 
 The actors in Dapr are based on the same virtual actor concept that [Orleans](https://www.microsoft.com/research/project/orleans-virtual-actors/) started, meaning that they are activated when called and deactivated after a period of time. If you are familiar with Orleans, Dapr C# actors will be familiar. Dapr C# actors are based on [Service Fabric Reliable Actors](https://docs.microsoft.com/azure/service-fabric/service-fabric-reliable-actors-introduction) (which also came from Orleans) and enable you to take Reliable Actors in Service Fabric and migrate them to other hosting platforms such as Kubernetes or other on-premise environments.
-Also Dapr is about more than just actors. It provides you with a set of best practice building blocks to build into any microservices application. See [Dapr overview](https://github.com/dapr/docs/blob/master/overview.md)
+Also Dapr is about more than just actors. It provides you with a set of best practice building blocks to build into any microservices application. See [Dapr overview](https://github.com/dapr/docs/blob/master/overview/README.md).
 
 ### Differences between Dapr from an actor framework
 

concepts/hosting/README.md

@@ -9,11 +9,11 @@ Dapr can run on multiple hosting platforms.
 
 ## Running Dapr on a local developer machine in self hosted mode
 
-Dapr can be configured to run on your local developer machine in [self hosted mode](../getting-started). Each running service has a Dapr runtime process (or sidecar) which is configured to use state stores, pub/sub, binding components and the other building blocks. 
+Dapr can be configured to run on your local developer machine in [self hosted mode](../../getting-started). Each running service has a Dapr runtime process (or sidecar) which is configured to use state stores, pub/sub, binding components and the other building blocks. 
 
 In self hosted mode, Redis is running locally in a container and is configured to serve as both the default component for state store and for pub/sub. A Zipkin container is also configured for diagnostics and tracing.  After running `dapr init`, see the `$HOME/.dapr/components` directory (Mac/Linux) or `%USERPROFILE%\.dapr\components` on Windows.
 
-The `dapr-placement` service is responsible for managing the actor distribution scheme and key range settings. This service is only required if you are using Dapr actors. For more information on the actor `Placement` service read [actor overview](../concepts/actors). 
+The `dapr-placement` service is responsible for managing the actor distribution scheme and key range settings. This service is only required if you are using Dapr actors. For more information on the actor `Placement` service read [actor overview](../actors). 
 
 <img src="../../images/overview_standalone.png" width=800>
 
@@ -23,7 +23,7 @@ You can use the [Dapr CLI](https://github.com/dapr/cli#launch-dapr-and-your-app)
 
 Dapr can be configured to run on any [Kubernetes cluster](https://github.com/dapr/quickstarts/tree/master/hello-kubernetes). In Kubernetes the `dapr-sidecar-injector` and `dapr-operator` services provide first class integration to launch Dapr as a sidecar container in the same pod as the service container and provide notifications of Dapr component updates provisioned into the cluster. Additionally, the `dapr-sidecar-injector` also injects the environment variables `DAPR_HTTP_PORT` and `DAPR_GRPC_PORT` into **all** the containers in the pod to enable user defined applications to easily communicate with Dapr without hardcoding Dapr port values. 
 
-The `dapr-sentry` service is a certificate authority that enables mutual TLS between Dapr sidecar instances for secure data encryption. For more information on the `Sentry` service read the [security overview](../concepts/security/README.md#dapr-to-dapr-communication)
+The `dapr-sentry` service is a certificate authority that enables mutual TLS between Dapr sidecar instances for secure data encryption. For more information on the `Sentry` service read the [security overview](../security/README.md#dapr-to-dapr-communication)
 
 <img src="../../images/overview_kubernetes.png" width=800>
 

concepts/middleware/README.md

@@ -6,7 +6,7 @@ Dapr allows custom processing pipelines to be defined by chaining a series of mi
 
 ## Customize processing pipeline
 
-When launched, a Dapr sidecar constructs a middleware processing pipeline. By default the pipeline consists of [tracing middleware](../observabilty/traces.md) and CORS middleware. Additional middleware, configured by a Dapr [configuration](../configuration/README.md), can be added to the pipeline in the order they are defined. The pipeline applies to all Dapr API endpoints, including state, pub/sub, service invocation, bindings, security and others.
+When launched, a Dapr sidecar constructs a middleware processing pipeline. By default the pipeline consists of [tracing middleware](../observability/traces.md) and CORS middleware. Additional middleware, configured by a Dapr [configuration](../configuration/README.md), can be added to the pipeline in the order they are defined. The pipeline applies to all Dapr API endpoints, including state, pub/sub, service invocation, bindings, security and others.
 
 > **NOTE:** Dapr provides a **middleware.http.uppercase** pre-registered component that changes all text in a request body to uppercase. You can use it to test/verify if your custom pipeline is in place.
 

howto/policies-with-opa/README.md

@@ -175,5 +175,5 @@ type Result struct {
 
 ## Related links
 
-- Open Policy Agent: https://www.openpolicyagent.com
+- Open Policy Agent: https://www.openpolicyagent.org
 - HTTP API Example: https://www.openpolicyagent.org/docs/latest/http-api-authorization/

howto/pubsub-namespaces/README.md

@@ -16,7 +16,7 @@ The table below shows which resources are deployed to which namespaces:
 
 ## Pre-requisites
 
-* [Dapr installed](https://github.com/dapr/docs/blob/master/getting-started/environment-setup.md.) on any namespace since Dapr works at the cluster level.
+* [Dapr installed](https://github.com/dapr/docs/blob/master/getting-started/environment-setup.md) on any namespace since Dapr works at the cluster level.
 * Checkout and cd into directory for [PubSub sample](https://github.com/dapr/quickstarts/tree/master/pub-sub).
 
 ## Setup `namespace-a`

howto/run-with-docker/README.md

@@ -133,7 +133,7 @@ services:
 
 > For those running the Docker daemon on a Linux host, you can also use `network_mode: host` to leverage host networking if needed.
 
-To further learn how to run Dapr with Docker Compose, see the [Docker-Compose Sample](https://github.com/dapr/samples/hello-docker-compose).
+To further learn how to run Dapr with Docker Compose, see the [Docker-Compose Sample](https://github.com/dapr/samples/tree/master/hello-docker-compose).
 
 ## Run Dapr in a Docker container on Kubernetes
 If your deployment target is Kubernetes then you're probably better of running your applicaiton and Dapr sidecars directly on

howto/setup-pub-sub-message-broker/README.md

@@ -24,7 +24,7 @@ spec:
 ```
 
 The type of message bus is determined by the `type` field, and things like connection strings and other metadata are put in the `.metadata` section.
-Even though you can put plain text secrets in there, it is recommended you use a [secret store](../../concepts/components/secrets.md).
+Even though you can put plain text secrets in there, it is recommended you use a [secret store](../../concepts/secrets).
 
 ## Running locally
 

howto/setup-secret-store/azure-keyvault-managed-identity.md

@@ -271,6 +271,6 @@ In Kubernetes mode, you store the certificate for the service principal into the
 ## References
 
 - [Azure CLI Keyvault CLI](https://docs.microsoft.com/en-us/cli/azure/keyvault?view=azure-cli-latest#az-keyvault-create)
-- [Create an Azure service principal with Azure CLI](https://docs.microsoft.com/en-us/cli/azure/-reate-an-azure-service-principal-azure-cli?view=azure-cli-latest)
+- [Create an Azure service principal with Azure CLI](https://docs.microsoft.com/en-us/cli/azure/create-an-azure-service-principal-azure-cli?view=azure-cli-latest)
 - [AAD Pod Identity](https://github.com/Azure/aad-pod-identity)
 - [Secrets Component](../../concepts/secrets/README.md)