fix: ffmpeg added to Dockerfile.full, id3v2 to go.mod

Dockerfile.full

@@ -0,0 +1,86 @@
+# Multi-stage build: compile frontend + backend, then package
+# This is a full build Dockerfile for filebrowser from source
+
+##############################################################################
+# Stage 1: Build frontend (Node.js / pnpm)
+##############################################################################
+FROM node:20-alpine AS frontend-builder
+
+RUN corepack enable && corepack prepare pnpm@latest --activate
+
+WORKDIR /app/frontend
+COPY frontend/package.json frontend/pnpm-lock.yaml ./
+RUN pnpm install --frozen-lockfile
+
+COPY frontend/ ./
+RUN pnpm run build
+
+##############################################################################
+# Stage 2: Build backend (Go)
+##############################################################################
+FROM golang:1.25-alpine AS backend-builder
+
+RUN apk add --no-cache git
+
+WORKDIR /app
+COPY . .
+COPY --from=frontend-builder /app/frontend/dist ./frontend/dist
+
+RUN go mod tidy && go mod download
+
+ARG VERSION=dev
+ARG GIT_COMMIT=unknown
+
+RUN CGO_ENABLED=0 go build \
+    -ldflags="-s -w -X 'github.com/filebrowser/filebrowser/v2/version.Version=${VERSION}' -X 'github.com/filebrowser/filebrowser/v2/version.CommitSHA=${GIT_COMMIT}'" \
+    -o filebrowser .
+
+##############################################################################
+# Stage 3: Fetch runtime dependencies
+##############################################################################
+FROM alpine:3.23 AS fetcher
+
+RUN apk update && \
+    apk --no-cache add ca-certificates mailcap tini-static && \
+    wget -O /JSON.sh https://raw.githubusercontent.com/dominictarr/JSON.sh/0d5e5c77365f63809bf6e77ef44a1f34b0e05840/JSON.sh
+
+##############################################################################
+# Stage 4: Final runtime image (Alpine with ffmpeg)
+##############################################################################
+FROM alpine:3.23
+
+ENV UID=1000
+ENV GID=1000
+
+RUN addgroup -g $GID user && \
+    adduser -D -u $UID -G user user && \
+    apk add --no-cache ffmpeg
+
+# Copy compiled binary from backend-builder
+COPY --from=backend-builder --chown=user:user /app/filebrowser /bin/filebrowser
+
+# Copy scripts and configs from repo
+COPY --chown=user:user docker/common/ /
+COPY --chown=user:user docker/alpine/ /
+
+# Copy runtime deps from fetcher
+COPY --chown=user:user --from=fetcher /sbin/tini-static /bin/tini
+COPY --from=fetcher /JSON.sh /JSON.sh
+COPY --from=fetcher /etc/ca-certificates.conf /etc/ca-certificates.conf
+COPY --from=fetcher /etc/ca-certificates /etc/ca-certificates
+COPY --from=fetcher /etc/mime.types /etc/mime.types
+COPY --from=fetcher /etc/ssl /etc/ssl
+
+RUN mkdir -p /config /database /srv && \
+    chown -R user:user /config /database /srv && \
+    chmod +x /healthcheck.sh
+
+HEALTHCHECK --start-period=2s --interval=5s --timeout=3s CMD /healthcheck.sh
+
+USER user
+
+VOLUME /srv /config /database
+
+EXPOSE 80
+
+ENTRYPOINT [ "tini", "--", "/init.sh" ]