Add docker build and push script

Dockerfile

@@ -17,4 +17,7 @@ RUN pip install --no-cache-dir --upgrade -r /app/requirements.txt
 
 RUN pip install --no-cache-dir -U meinheld
 
+ARG SOURCE_VERSION
+ENV SOURCE_VERSION ${SOURCE_VERSION:-unknown}
+
 COPY ./backend /app

build_container.sh

@@ -0,0 +1,45 @@
+#!/bin/bash
+
+# Get username from command line
+if [ $# -eq 0 ]; then
+    echo "No username supplied. Please supply a github username as the first argument."
+    exit 1
+fi
+
+# Store username in variable
+USERNAME=$1
+
+# Check for uncommitted changes
+if ! git diff-index --quiet HEAD --; then
+    echo "You have uncommitted changes. Please commit or stash them and try again."
+    exit 1
+fi
+
+# Check if the user is logged into ghcr.io
+if ! docker info | grep -q "Username: $USERNAME"; then
+    echo "You are not logged into ghcr.io. Please run 'docker login ghcr.io' and try again."
+    exit 1
+fi
+
+# Get the appropriate version of the container using git
+VERSION=$(git rev-parse --abbrev-ref HEAD)-$(git describe)
+
+# Build the container. Add the version as a tag and as ENV variable SOURCE_VERSION
+docker build -t ghcr.io/$USERNAME/:$VERSION --build-arg SOURCE_VERSION=$VERSION .
+
+# Ask the user if they want to push the container. Confirm Version.
+read -p "Push container to ghcr.io/$USERNAME/karaoqueue:$VERSION? [y/n] " -n 1 -r
+echo
+if [[ $REPLY =~ ^[Yy]$ ]]
+then
+    docker push ghcr.io/$USERNAME/karaoqueue:$VERSION
+fi
+
+# Ask the user if they want to push the container as latest
+read -p "Push container to ghcr.io/$USERNAME/karaoqueue:latest? [y/n] " -n 1 -r
+echo
+if [[ $REPLY =~ ^[Yy]$ ]]
+then
+    docker tag ghcr.io/$USERNAME/karaoqueue:$VERSION ghcr.io/$USERNAME/karaoqueue:latest
+    docker push ghcr.io/$USERNAME/karaoqueue:latest
+fi