Add admin instance management and system tools

- Implemented sync_dev_hosts.sh for managing local hosts entries for development.
- Created admin_instances.html for managing school instances, including creation and listing.
- Developed admin_system.html for core services management, including restart and backup operations.
- Added my_instance.html for users to view and manage their assigned instances.
- Introduced provision_instance.sh for provisioning new instances with Docker, including Nginx configuration and SSL certificate handling.

Website/Dockerfile

@@ -1,49 +1,43 @@
-FROM python:3.12-slim AS builder
+FROM python:3.12-slim
 
 ENV PYTHONDONTWRITEBYTECODE=1 \
     PYTHONUNBUFFERED=1
 
 WORKDIR /app
 
-ARG NUITKA_JOBS=1
-ARG NUITKA_LOW_MEMORY=1
-
 RUN apt-get update \
-    && apt-get install -y --no-install-recommends build-essential patchelf \
+    && apt-get install -y --no-install-recommends \
+       git \
+       iproute2 \
+       docker.io \
+       curl \
+       openssl \
+       ca-certificates \
     && rm -rf /var/lib/apt/lists/*
 
+RUN set -eu; \
+        arch="$(dpkg --print-architecture)"; \
+        case "$arch" in \
+            amd64) compose_arch="x86_64" ;; \
+            arm64) compose_arch="aarch64" ;; \
+            *) echo "Unsupported architecture for compose plugin: $arch"; exit 1 ;; \
+        esac; \
+        curl -fsSL "https://download.docker.com/linux/static/stable/${compose_arch}/docker-27.1.1.tgz" \
+            -o /tmp/docker.tgz; \
+        tar -xzf /tmp/docker.tgz -C /tmp; \
+        install -m 0755 /tmp/docker/docker /usr/local/bin/docker; \
+        rm -rf /tmp/docker /tmp/docker.tgz; \
+        mkdir -p /usr/libexec/docker/cli-plugins; \
+        curl -fsSL "https://github.com/docker/compose/releases/download/v2.29.7/docker-compose-linux-${compose_arch}" \
+            -o /usr/libexec/docker/cli-plugins/docker-compose; \
+        chmod +x /usr/libexec/docker/cli-plugins/docker-compose
+
 COPY requirements.txt ./
-RUN pip install --no-cache-dir -r requirements.txt \
-    && pip install --no-cache-dir nuitka ordered-set zstandard
+RUN pip install --no-cache-dir -r requirements.txt
 
 COPY . .
-
-# Build a standalone binary with all required templates/static/data assets.
-# Defaults are tuned for lower RAM pressure to avoid host crashes.
-RUN set -eu; \
-    EXTRA_FLAGS=""; \
-    if [ "$NUITKA_LOW_MEMORY" = "1" ]; then \
-        EXTRA_FLAGS="--low-memory --lto=no"; \
-    fi; \
-    python -m nuitka \
-        --standalone \
-        --follow-imports \
-        --assume-yes-for-downloads \
-        --jobs="$NUITKA_JOBS" \
-        --remove-output \
-        --include-data-dir=templates=templates \
-        --include-data-dir=static=static \
-        --include-data-dir=data=data \
-        --output-dir=build \
-        $EXTRA_FLAGS \
-        main.py
-
-FROM python:3.12-slim AS runtime
-
-WORKDIR /app
-
-COPY --from=builder /app/build/main.dist ./
+RUN chmod +x /app/provision_instance.sh
 
 EXPOSE 4999
 
-CMD ["./main.bin"]
+CMD ["python", "main.py"]