Add Dockerfile for building and pushing the application image (#1265)

This pull request adds a Dockerfile for building and pushing the application image. The Dockerfile includes the necessary steps to set up the environment, install dependencies, and run the application.

.github/workflows/pre-release.yml

@@ -61,4 +61,5 @@ jobs:
         with:
           context: .
           push: true
+          file: ./build_and_push.Dockerfile
           tags: logspace/langflow:${{ steps.check-version.outputs.version }}

build_and_push.Dockerfile

@@ -0,0 +1,79 @@
+
+
+# syntax=docker/dockerfile:1
+# Keep this syntax directive! It's used to enable Docker BuildKit
+
+# Based on https://github.com/python-poetry/poetry/discussions/1879?sort=top#discussioncomment-216865
+# but I try to keep it updated (see history)
+
+################################
+# PYTHON-BASE
+# Sets up all our shared environment variables
+################################
+FROM python:3.10-slim as python-base
+
+# python
+ENV PYTHONUNBUFFERED=1 \
+    # prevents python creating .pyc files
+    PYTHONDONTWRITEBYTECODE=1 \
+    \
+    # pip
+    PIP_DISABLE_PIP_VERSION_CHECK=on \
+    PIP_DEFAULT_TIMEOUT=100 \
+    \
+    # poetry
+    # https://python-poetry.org/docs/configuration/#using-environment-variables
+    POETRY_VERSION=1.7.1 \
+    # make poetry install to this location
+    POETRY_HOME="/opt/poetry" \
+    # make poetry create the virtual environment in the project's root
+    # it gets named `.venv`
+    POETRY_VIRTUALENVS_IN_PROJECT=true \
+    # do not ask any interactive question
+    POETRY_NO_INTERACTION=1 \
+    \
+    # paths
+    # this is where our requirements + virtual environment will live
+    PYSETUP_PATH="/opt/pysetup" \
+    VENV_PATH="/opt/pysetup/.venv"
+
+
+# prepend poetry and venv to path
+ENV PATH="$POETRY_HOME/bin:$VENV_PATH/bin:$PATH"
+
+
+################################
+# BUILDER-BASE
+# Used to build deps + create our virtual environment
+################################
+FROM python-base as builder-base
+RUN
+RUN apt-get update \
+    && apt-get install --no-install-recommends -y \
+    # deps for installing poetry
+    curl \
+    # deps for building python deps
+    build-essential \
+    # npm
+    npm
+
+
+# Now we need to copy the entire project into the image
+WORKDIR /app
+COPY pyproject.toml poetry.lock ./
+COPY src ./src
+COPY Makefile ./
+COPY README.md ./
+RUN curl -sSL https://install.python-poetry.org | python3 - && make build
+
+# Final stage for the application
+FROM python-base as final
+
+# Copy virtual environment and built .tar.gz from builder base
+COPY --from=builder-base /app/dist/*.tar.gz ./
+
+# Install the package from the .tar.gz
+RUN pip install *.tar.gz
+
+WORKDIR /app
+CMD ["python", "-m", "langflow", "run", "--host", "0.0.0.0", "--port", "7860"]