Reduce docker image size

.dockerignore

@@ -1,11 +1,22 @@
 # Don't include caches, logs and documentation
-cache.sqlite
 *.log
+.circleci
+.codecov
+.git
+.github
+.gitignore
+.vscode
+cache.sqlite
 README.md
 HACKING.md
 
 # The run script isn't needed
 run
+.docker-project
+
+# Environemnt
+.env
+.env.local
 
 # Node is only needed for building, not running
 package.json

Dockerfile

@@ -5,15 +5,14 @@ ENV LANG C.UTF-8
 WORKDIR /srv
 
 # System dependencies
-RUN apt-get update && apt-get install --yes python3-pip libsodium-dev
+RUN apt-get update && apt-get install --no-install-recommends --yes python3 python3-setuptools python3-pip libsodium-dev
 
 # Import code, install code dependencies
 ADD . .
-RUN pip3 install -r requirements.txt
+RUN python3 -m pip install --no-cache-dir -r requirements.txt
 
 # Set git commit ID
 ARG COMMIT_ID
-RUN test -n "${COMMIT_ID}"
 RUN echo "${COMMIT_ID}" > version-info.txt
 ENV COMMIT_ID "${COMMIT_ID}"