.dockerignore

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+.git
+.github
+.playwright-mcp
+node_modules
+dist
+build
+electron
+test
+deploy
+*.md
+
+# Always re-downloaded inside the build so the image is reproducible.
+src/vendor

.gitignore

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+node_modules/
+dist/
+build/icon.png
+
+# Populated by `npm run vendor` (~19 MB, mostly the ffmpeg asm.js build).
+src/vendor/
+
+.playwright-mcp/
+*.log

Dockerfile

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+# syntax=docker/dockerfile:1
+#
+# Motionity is a static app, so the runtime image is a static file server and
+# nothing else: no Node, no shell tooling, ~8 MB of base image.
+#
+# Build:  docker build -t motionity:latest .
+# Run:    docker run --rm -p 8080:8080 motionity:latest
+#
+# WITH_FFMPEG=0 drops the 18.5 MB asm.js ffmpeg build from the image. MP4/GIF
+# export then downloads it from archive.org on first use instead of working
+# offline; everything else is unaffected.
+
+FROM node:22-alpine AS vendor
+ARG WITH_FFMPEG=1
+WORKDIR /app
+COPY scripts/vendor.mjs scripts/
+COPY src/index.html src/
+RUN if [ "$WITH_FFMPEG" = "1" ]; then \
+      node scripts/vendor.mjs; \
+    else \
+      node scripts/vendor.mjs --skip-ffmpeg; \
+    fi
+
+FROM ghcr.io/static-web-server/static-web-server:2-alpine
+
+COPY --chown=65534:65534 src/ /public/
+COPY --from=vendor --chown=65534:65534 /app/src/vendor/ /public/vendor/
+
+ENV SERVER_ROOT=/public \
+    SERVER_HOST=0.0.0.0 \
+    SERVER_PORT=8080 \
+    SERVER_COMPRESSION=true \
+    SERVER_COMPRESSION_LEVEL=default \
+    SERVER_CACHE_CONTROL_HEADERS=true \
+    SERVER_LOG_LEVEL=warn \
+    SERVER_SECURITY_HEADERS=false \
+    SERVER_HEALTH=true
+
+USER 65534:65534
+EXPOSE 8080
+
+HEALTHCHECK --interval=30s --timeout=3s --start-period=5s \
+  CMD wget -q --spider http://127.0.0.1:8080/health || exit 1
+
+# NOTE: browsers expose WebCodecs (the fast exporter) and IndexedDB (project
+# saving) only in a secure context. Reaching this container over plain http://
+# from another machine disables both. Publish it behind TLS, or keep access on
+# http://localhost.

docker-compose.yml

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+services:
+  motionity:
+    build:
+      context: .
+      # WITH_FFMPEG: "0" trims 18.5 MB by fetching the MP4/GIF encoder from
+      # archive.org at runtime instead of shipping it.
+      args:
+        WITH_FFMPEG: "1"
+    image: motionity:latest
+    ports:
+      - "8080:8080"
+    restart: unless-stopped
+    read_only: true
+    security_opt:
+      - no-new-privileges:true