From 94dc16a0bb4646f96d5c32d2f42199e6b1bc74f7 Mon Sep 17 00:00:00 2001
From: Sindre Stephansen <sindre@sindrestephansen.com>
Date: Sat, 14 Mar 2020 19:35:31 +0100
Subject: [PATCH] Optimize Docker build

---
 src/Dockerfile | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/src/Dockerfile b/src/Dockerfile
index 19facd4..dcdba7e 100755
--- a/src/Dockerfile
+++ b/src/Dockerfile
@@ -4,10 +4,11 @@ FROM tiangolo/uwsgi-nginx:python3.7
 ENV LISTEN_PORT 8080
 EXPOSE 8080
 
-# Define environment
-COPY ./app /app
-RUN echo ${groupid} > /app/models/.env
 WORKDIR /app
+
+# The requirements file is copied first, so if there are no changes
+# docker will skip installing them again, and use a cached image instead
+COPY ./app/requirements.txt /app/
 ENV PYTHONPATH=/app
 
 # Install python dependencies
@@ -23,6 +24,10 @@ COPY entrypoint.sh /entrypoint.sh
 RUN chmod +x /entrypoint.sh
 ENTRYPOINT ["/entrypoint.sh"]
 
+# Copy the rest of the project files and define the environment
+COPY ./app /app
+RUN echo ${groupid} > /app/models/.env
+
 # Allow waiting script to be executed
 RUN chmod +x ./wait-for-it.sh