Add build automation and CI publishing workflow

Makefile

@@ -0,0 +1,53 @@
+SHELL := /bin/bash
+
+PROJECT_ROOT := $(CURDIR)
+ANDROID_DIR := $(PROJECT_ROOT)/android
+WEBSITE_DIR := $(PROJECT_ROOT)/website
+DOWNLOADS_DIR := $(WEBSITE_DIR)/downloads
+META_DIR := $(WEBSITE_DIR)/assets/meta
+APK_PATH := $(ANDROID_DIR)/app/build/outputs/apk/debug/app-debug.apk
+PUBLISHED_APK := $(DOWNLOADS_DIR)/app-debug.apk
+VERSION_FILE := $(META_DIR)/version.json
+
+.PHONY: help client-version-bump client-build client-publish publish \
+	server-start server-stop server-restart server-status server-rebuild
+
+help:
+	@echo "Targets:"
+	@echo "  make client-build      - bump version and build debug APK"
+	@echo "  make client-publish    - copy APK to website and refresh version metadata"
+	@echo "  make publish           - bump version, build APK, publish client, reload nginx"
+	@echo "  make server-start      - start nginx"
+	@echo "  make server-stop       - stop nginx"
+	@echo "  make server-restart    - restart nginx"
+	@echo "  make server-status     - show nginx status"
+	@echo "  make server-rebuild    - test nginx config and reload nginx"
+
+client-version-bump:
+	@$(PROJECT_ROOT)/scripts/bump_version.sh
+
+client-build: client-version-bump
+	cd $(ANDROID_DIR) && ./gradlew assembleDebug --no-daemon
+
+client-publish:
+	@mkdir -p $(DOWNLOADS_DIR) $(META_DIR)
+	cp $(APK_PATH) $(PUBLISHED_APK)
+	@$(PROJECT_ROOT)/scripts/update_site_metadata.sh
+
+publish: client-build client-publish server-rebuild
+
+server-start:
+	sudo systemctl start nginx
+
+server-stop:
+	sudo systemctl stop nginx
+
+server-restart:
+	sudo systemctl restart nginx
+
+server-status:
+	sudo systemctl status nginx --no-pager
+
+server-rebuild:
+	sudo /usr/sbin/nginx -t
+	sudo systemctl reload nginx