Initial Joplin Web Docker setup

Dockerfile

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+FROM jetpackio/devbox:latest AS builder
+
+USER root
+
+RUN apt-get update && \
+    apt-get install -y \
+        git \
+        ca-certificates \
+        curl \
+        rsync \
+    && rm -rf /var/lib/apt/lists/*
+
+# Nix Build-Gruppe anlegen
+RUN groupadd -r nixbld || true && \
+    for i in $(seq 1 10); do \
+        useradd -r \
+            -g nixbld \
+            -G nixbld \
+            -d /var/empty \
+            -s /usr/sbin/nologin \
+            nixbld$i || true; \
+    done
+
+WORKDIR /src
+
+# Stabile Joplin-Version herunterladen
+RUN git clone \
+    --depth 1 \
+    --branch v3.6.15 \
+    https://github.com/laurent22/joplin.git .
+
+# Version kontrollieren
+RUN git describe --tags --exact-match
+
+# Joplin Build-Umgebung vorbereiten
+RUN devbox run -- yarn --version
+
+# Joplin-Abhängigkeiten installieren
+# RUN devbox run -- yarn install
+RUN devbox run -- sh -c 'yarn install || { \
+    echo "===== YARN BUILD ERROR LOGS ====="; \
+    find /tmp -type f -name build.log -print -exec cat {} \; 2>/dev/null; \
+    exit 1; \
+    }'
+
+# Web-App bauen
+WORKDIR /src
+
+#RUN devbox run -- yarn web
+RUN devbox run -- sh -c 'cd /src/packages/app-mobile && yarn web'
+
+
+# --------------------------------------------------
+# Fertiges Web-Frontend
+# --------------------------------------------------
+
+FROM nginx:alpine
+
+RUN rm -f /etc/nginx/conf.d/default.conf
+
+COPY nginx.conf /etc/nginx/conf.d/default.conf
+
+COPY --from=builder \
+    /src/packages/app-mobile/web/dist/ \
+    /usr/share/nginx/html/
+
+EXPOSE 80
+
+CMD ["nginx", "-g", "daemon off;"]