Add master docker build

.github/workflows/docker.yml

@@ -14,3 +14,10 @@ jobs:
     uses: named-data/actions/.github/workflows/docker-image.yml@v1
     with:
       name: http-ca-server
+      target: http-ca-server
+
+  testbed-master:
+    uses: named-data/actions/.github/workflows/docker-image.yml@v1
+    with:
+      name: testbed-master
+      target: testbed-master

Dockerfile

@@ -1,15 +1,32 @@
 # syntax=docker/dockerfile:1
 
+FROM python:3-alpine AS testbed-master
+
+RUN <<EOF
+    apk add docker-cli docker-cli-compose
+    pip install --no-cache-dir --disable-pip-version-check \
+        PyYAML \
+        python-ndn==0.4.2 \
+        Jinja2==3.1.4
+EOF
+
+VOLUME /repo
+WORKDIR /repo
+
+
 ARG NDN_CXX_VERSION=latest
 FROM ghcr.io/named-data/ndn-cxx-runtime:${NDN_CXX_VERSION} AS http-ca-server
 
-RUN apt-get install -Uy --no-install-recommends \
+RUN <<EOF
+    apt-get install -Uy --no-install-recommends \
         python3 \
-        python3-pip \
-    && apt-get distclean \
-    && pip install --no-cache-dir --disable-pip-version-check --break-system-packages \
-        pyyaml \
-        python-ndn
+        python3-pip
+    apt-get distclean
+
+    pip install --no-cache-dir --disable-pip-version-check --break-system-packages \
+        PyYAML \
+        python-ndn==0.4.2
+EOF
 
 COPY http-ca-server.py /app/http-ca-server.py