Add user-data script for installing service on a cloud provider VM

The script will:
1. Install necessary dependencies
2. Create the DB file
3. Run the migrations
4. Initialize the DB with the seed data
5. Move the systemd unit file to the correct location
6. Enable the systemd service

The script will NOT:
- Create the `.env` file
- Start the server (the systemd service will start the server on reboot tho)

Makefile

@@ -12,6 +12,13 @@ HTMX_VERSION ?= 2.0.3
 BOOTSTRAP_VERSION ?= 5.3.3
 BOOTSTRAP_ICONS_VERSION ?= 1.11.3
 
+install: install-go-deps init-db build
+	mv -u prod/nutrition-tracker.service /etc/systemd/system/nutrition-tracker.service
+	systemctl enable nutrition-tracker.service
+
+start:
+	systemctl start nutrition-tracker.service
+
 install-go-deps:
 	go install -v github.com/sqlc-dev/sqlc/cmd/sqlc@$(SQLC_VERSION)
 	go install -v -tags 'sqlite3' github.com/golang-migrate/migrate/v4/cmd/migrate@$(GOLANG_MIGRATE_VERSION)

prod/nutrition-tracker.service

@@ -0,0 +1,19 @@
+[Unit]
+Description=Nutrition Tracker server
+ConditionFileNotEmpty=~/nutriton-tracker/.env
+ConditionPathExists=~/nutriton-tracker/sqlite/nutrition-tracker.db
+After=multi-user.target
+Wants=multi-user.target
+StartLimitIntervalSec=600
+StartLimitBurst=5
+
+[Service]
+Type=simple
+ExecStartPre=/bin/bash -c 'echo "$(date +"%%F-%%T") starting" >> /var/log/nutrition-tracker-starts.log'
+ExecStart=/bin/bash -c '~/nutriton-tracker/out/nutrition-tracker ~/nutriton-tracker/.env 2>&1 | tee /var/log/nutrition-tracker.log && exit ${PIPESTATUS[0]}'
+ExecStartPost=/bin/bash -c 'echo "$(date +"%%F-%%T") started" >> /var/log/nutrition-tracker-starts.log'
+Restart=on-failure
+TimeoutSec=30
+
+[Install]
+WantedBy=multi-user.target

prod/user-data.sh

@@ -0,0 +1,20 @@
+#!/bin/bash
+
+# logging
+exec >> /var/log/user-data.log
+exec 2>&1
+
+set -ex -o pipefail
+
+main() {
+  if [[ ! -d ~/nutrition-tracker ]]; then
+    cd ~
+    git clone https://github.com/szabolcs-horvath/nutrition-tracker.git
+    cd nutrition-tracker
+    make install
+  else
+    echo "Nutrition Tracker already installed."
+  fi
+}
+
+main "$@"