build: lock user guide localdev dependencies with hashes (#248)

Author: Djaytan

docs/user-guide/Dockerfile

@@ -6,14 +6,17 @@ FROM docker.io/python:3.12.11-alpine@sha256:c610e4a94a0e8b888b4b225bfc0e6b59dee6
 
 WORKDIR /run
 
-# Install MkDocs
-RUN pip install mkdocs-material[recommended]
+COPY requirements.txt .
 
-# Install MkDocs Git-related features (e.g. revisions, collaborators, ...)
-RUN apk add --no-cache git && \
-    pip install \
-      mkdocs-git-revision-date-localized-plugin \
-      mkdocs-git-committers-plugin-2 && \
+RUN \
+  ## Install MkDocs and its dependencies
+    pip install --no-cache-dir --require-hashes --requirement requirements.txt \
+  && \
+    rm requirements.txt \
+  ## Setup prerequisites for MkDocs Git-related features (e.g. revisions, collaborators, ...)
+  && \
+    apk add --no-cache git \
+  && \
     git config --system --add safe.directory /run
 
 USER daemon

docs/user-guide/mkdocs.sh

@@ -22,7 +22,7 @@ esac
 
 ROOT_PROJECT_DIR="${SCRIPT_DIR}/../.."
 
-echo 'Building Docker image for MkDocs (can take a while)'
+echo 'Building Docker image for MkDocs (can take a while - ~1 minutes)'
 docker build --progress quiet -t docker-papermc-server/mkdocs "${SCRIPT_DIR}"
 
 echo