Add recipe: 'create a docker image'

Author: OutOfScopeia

docs/recipes/build/docker-image.md

@@ -0,0 +1,134 @@
+# How do I build with docker?
+
+Using [Docker](https://www.docker.com/) makes it possible to deploy your application as a docker container or release an image on docker hub. This recipe walks you through creating a `Dockerfile` and automating the build and test process with [Docker Hub](https://hub.docker.com/).
+
+#### 1. Create a .dockerignore file
+
+Create a `.dockerignore` file with the same contents as `.gitignore`
+
+##### Linux
+```bash
+cp .gitignore .dockerignore
+```
+##### Windows
+```bash
+copy .gitignore .dockerignore
+```
+
+Now, add the following lines to the `.dockerignore` file:
+
+```
+.git
+```
+
+#### 2. Create the dockerfile
+
+Create a `Dockerfile` with the following contents:
+
+```dockerfile
+FROM mcr.microsoft.com/dotnet/sdk:8.0 AS build
+
+# Install node
+ARG NODE_MAJOR=20
+RUN apt-get update
+RUN apt-get install -y ca-certificates curl gnupg
+RUN mkdir -p /etc/apt/keyrings
+RUN curl -fsSL https://deb.nodesource.com/gpgkey/nodesource-repo.gpg.key | gpg --dearmor -o /etc/apt/keyrings/nodesource.gpg
+RUN echo "deb [signed-by=/etc/apt/keyrings/nodesource.gpg] https://deb.nodesource.com/node_$NODE_MAJOR.x nodistro main" | tee /etc/apt/sources.list.d/nodesource.list
+RUN apt-get update && apt-get install nodejs -y
+
+WORKDIR /workspace
+COPY . .
+RUN dotnet tool restore
+RUN dotnet run Bundle
+
+FROM mcr.microsoft.com/dotnet/aspnet:8.0-alpine
+COPY --from=build /workspace/deploy /app
+WORKDIR /app
+EXPOSE 5000
+ENTRYPOINT [ "dotnet", "Server.dll" ]
+```
+
+This uses [multistage builds](https://docs.docker.com/develop/develop-images/multistage-build/) to keep the final image small.
+
+#### 3. Building and running with docker locally
+
+1. Build the image `docker build -t my-safe-app .`
+2. Run the container `docker run -it -p 8080:8080 my-safe-app`
+3. Open the page in browser at [http://localhost:8080](http://localhost:8080)
+
+
+
+> Because the build is done entirely in docker, Docker Hub [automated builds](https://docs.docker.com/docker-hub/builds/) can be setup to automatically build and push the docker image.
+
+#### 4. Testing the server
+Create a `docker-compose.server.test.yml` file with the following contents:
+
+```yml
+version: '3.4'
+services:
+    sut:
+        build:
+            target: build
+            context: .
+        working_dir: /workspace/tests/Server
+        command: dotnet run
+```
+To run the tests execute the command `docker-compose -f docker-compose.server.test.yml up --build`
+
+> The template is not currently setup for automating the client tests in ci.
+
+> Docker Hub can also run [automated tests](https://docs.docker.com/docker-hub/builds/automated-testing/) for you.
+
+> Follow [the instructions to enable Autotest](https://docs.docker.com/docker-hub/builds/automated-testing/#enable-automated-tests-on-a-repository) on docker hub.
+
+#### 5. Making the docker build faster
+
+> Not recommended for most applications
+
+If you often build with docker locally, you may wish to make the build faster by optimising the Dockerfile for caching. For example, it is not necessary to download all paket and npm dependencies on every build unless there have been changes to the dependencies.
+
+Furthermore, the client and server can be built in separate build stages so that they are cached independently. Enable [Docker BuildKit](https://docs.docker.com/develop/develop-images/build_enhancements/) to build them concurrently.
+
+This comes at the expense of making the dockerfile more complex; if any changes are made to the build such as adding new projects or migrating package managers, the dockerfile must be updated accordingly.
+
+The following should be a good starting point but is not guaranteed to work.
+
+```dockerfile
+FROM mcr.microsoft.com/dotnet/sdk:8.0 AS build
+
+# Install node
+ARG NODE_MAJOR=20
+RUN apt-get update
+RUN apt-get install -y ca-certificates curl gnupg
+RUN mkdir -p /etc/apt/keyrings
+RUN curl -fsSL https://deb.nodesource.com/gpgkey/nodesource-repo.gpg.key | gpg --dearmor -o /etc/apt/keyrings/nodesource.gpg
+RUN echo "deb [signed-by=/etc/apt/keyrings/nodesource.gpg] https://deb.nodesource.com/node_$NODE_MAJOR.x nodistro main" | tee /etc/apt/sources.list.d/nodesource.list
+RUN apt-get update && apt-get install nodejs -y
+
+WORKDIR /workspace
+COPY .config .config
+RUN dotnet tool restore
+COPY .paket .paket
+COPY paket.dependencies paket.lock ./
+
+FROM build as server-build
+COPY src/Shared src/Shared
+COPY src/Server src/Server
+RUN cd src/Server && dotnet publish -c release -o ../../deploy
+
+FROM build as client-build
+COPY package.json package-lock.json ./
+RUN npm install
+COPY src/Shared src/Shared
+COPY src/Client src/Client
+RUN dotnet fable src/Client --run npx vite build
+
+
+FROM mcr.microsoft.com/dotnet/aspnet:8.0-alpine
+COPY --from=server-build /workspace/deploy /app
+COPY --from=client-build /workspace/deploy /app
+WORKDIR /app
+EXPOSE 5000
+ENTRYPOINT [ "dotnet", "Server.dll" ]
+```

mkdocs.yml

@@ -70,6 +70,7 @@ nav:
       - Upgrade from V4 to V5: "recipes/upgrading/v4-to-v5.md"
       - Create a new Recipe: "recipes/template.md"
       - Build:
+          - Create a docker image: "recipes/build/docker-image.md"
           - Remove FAKE: "recipes/build/remove-fake.md"
           - Package my SAFE app for deployment: "recipes/build/bundle-app.md"
       - UI: