feat: add Dockerfile and GitLab CI/CD pipeline

Add Docker containerization with Deno and persistent SQLite volume.
Add GitLab CI pipeline with build and deploy stages.
Use SQLITE_PATH env var for configurable DB location.

.gitlab-ci.yml

@@ -0,0 +1,39 @@
+stages:
+  - build
+  - deploy
+
+variables:
+  IMAGE_TAG: $CI_REGISTRY_IMAGE:$CI_COMMIT_SHORT_SHA
+  IMAGE_LATEST: $CI_REGISTRY_IMAGE:latest
+
+build:
+  stage: build
+  image: docker:latest
+  services:
+    - docker:dind
+  before_script:
+    - docker login -u $CI_REGISTRY_USER -p $CI_REGISTRY_PASSWORD $CI_REGISTRY
+  script:
+    - docker build -t $IMAGE_TAG -t $IMAGE_LATEST .
+    - docker push $IMAGE_TAG
+    - docker push $IMAGE_LATEST
+
+deploy:
+  stage: deploy
+  image: docker:latest
+  services:
+    - docker:dind
+  before_script:
+    - docker login -u $CI_REGISTRY_USER -p $CI_REGISTRY_PASSWORD $CI_REGISTRY
+  script:
+    - docker pull $IMAGE_LATEST
+    - docker stop litenote-jetstream || true
+    - docker rm litenote-jetstream || true
+    - >
+      docker run -d
+      --name litenote-jetstream
+      --restart unless-stopped
+      -v litenote-data:/data
+      $IMAGE_LATEST
+  only:
+    - main

Dockerfile

@@ -0,0 +1,15 @@
+FROM denoland/deno:2
+
+WORKDIR /app
+
+COPY deno.json deno.lock ./
+RUN deno install
+
+COPY . .
+RUN deno cache main.ts
+
+RUN mkdir -p /data
+VOLUME /data
+ENV SQLITE_PATH=/data/notes.db
+
+CMD ["deno", "run", "--allow-net", "--allow-read", "--allow-write", "--allow-env", "main.ts"]

src/data/db.ts

@@ -1,7 +1,7 @@
 import { DB } from "https://deno.land/x/sqlite/mod.ts";
 import type { Note } from "./note"
 
-export const db = new DB("notes.db");
+export const db = new DB(Deno.env.get("SQLITE_PATH") ?? "notes.db");
 
 export const upsertNote = async (note: Note) => {
   db.query(