ci: add a deploy step using docker-compose

docs image is built JIT from Dockerfile.
the logic for the compose file is based on the one used in
https://git.dotya.ml/dotya.ml/homepage yet the traefik part was not
used.

.drone.yml

@@ -44,6 +44,83 @@ steps:
     - hugo version
     - hugo --gc=true --minify
 
+---
+kind: pipeline
+type: docker
+name: deploy
+
+platform:
+  os: linux
+  arch: amd64
+
+trigger:
+  branch:
+  - master
+  event:
+    exclude: [pull_request, tag]
+
+environment:
+  # ref: https://www.docker.com/blog/faster-builds-in-compose-thanks-to-buildkit-support/
+  COMPOSE_DOCKER_CLI_BUILD: 1
+  DOCKER_BUILDKIT: 1
+
+node:
+  r: main
+
+depends_on:
+- build
+
+steps:
+- name: hugo-extended
+  pull: if-not-exists
+  image: immawanderer/fedora-hugo:latest
+  commands:
+    - git submodule init
+    - git submodule update
+    - hugo version
+    - hugo --gc=true --minify
+
+- name: rm-intermediate
+  pull: if-not-exists
+  image: immawanderer/fedora-hugo:latest
+  depends_on:
+  - hugo-extended
+  commands:
+    - rm -rf ./public
+
+- name: build
+  pull: always
+  image: tmaier/docker-compose:latest
+  depends_on:
+  - rm-intermediate
+  volumes:
+  - name: s
+    path: /var/run/docker.sock
+  commands:
+  - docker-compose build --no-cache
+  when:
+    branch: master
+    status: success
+
+- name: deploy
+  pull: always
+  image: tmaier/docker-compose:latest
+  depends_on:
+  - build
+  volumes:
+  - name: s
+    path: /var/run/docker.sock
+  commands:
+  - docker-compose up -d --remove-orphans
+  when:
+    branch: master
+    status: success
+
+volumes:
+- name: s
+  host:
+    path: /var/run/docker.sock
+
 ---
 kind: pipeline
 name: notifications

Dockerfile

@@ -0,0 +1,26 @@
+FROM immawanderer/fedora-hugo:latest AS hugobuild
+RUN mkdir -pv /docs
+COPY . /docs
+
+WORKDIR /docs
+
+RUN git submodule init \
+&& git submodule update --recursive \
+&& hugo version
+RUN hugo --minify --gc=true
+
+# WORKDIR /
+
+FROM nginx:mainline-alpine
+# COPY --from=hugobuild /home/$(whoami)/public/ /usr/share/nginx/html
+COPY --from=hugobuild /docs/public/ /usr/share/nginx/html
+
+# tripple slash reference
+# https://stackoverflow.com/questions/5190966/using-sed-to-insert-tabs/5191165#5191165
+RUN sed -i -e 's/^worker_processes  auto;/worker_processes auto;/'\
+ -e "/^events {$/ a \\\tmulti_accept on;\n\tuse epoll;"\
+ -e "/^http {$/ a \\\tserver_tokens off;\n\tetag off;\n"\
+ -e 's/#tcp_nopush/tcp_nopush/'\
+ -e "/tcp_nopush/ a \\\ttcp_nodelay on;"\
+ -e "s/^    */$(printf '\t')/"\
+ /etc/nginx/nginx.conf

docker-compose.yml

@@ -0,0 +1,21 @@
+version: '3'
+services:
+  docs:
+    build:
+      context: .
+    image: docs
+    networks:
+    - default
+    restart: always
+    ports:
+      - 127.0.0.1:1315:80
+    volumes:
+      - /var/run/docker.sock:/var/run/docker.sock:ro
+    logging:
+      driver: json-file
+      options:
+        max-size: "5m"
+        max-file: "5"
+
+networks:
+  default: