Update index.md

Remove `&emdash;` entry.
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Ulrich VACHON 2023-01-06 17:50:21 +01:00 committed by GitHub
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@ -98,7 +98,7 @@ RUN npm build # Run build
```
This Dockerfile is rather inefficient. Updating any file causes a reinstall of
all dependencies every time you build the Docker image &emdash; even if the
all dependencies every time you build the Docker image even if the
dependencies didn't change since last time!
Instead, the `COPY` command can be split in two. First, copy over the package