Reduce image size and better instructions

Dockerfile

@@ -1,10 +1,9 @@
-FROM tiangolo/uwsgi-nginx-flask:python3.7
-
-COPY requirements.txt /tmp/
-RUN pip install -r /tmp/requirements.txt
-
-RUN apt-get update && apt-get install -y openjdk-8-jre-headless
-# Needed to prevent Java from AWTError Assistive Technology not found
-RUN sed -i -e '/^assistive_technologies=/s/^/#/' /etc/java-*-openjdk/accessibility.properties
-
-COPY ./app /app
+FROM tiangolo/uwsgi-nginx-flask:python3.7-alpine3.8
+
+COPY requirements.txt /tmp/ 
+RUN pip install --upgrade pip 
+RUN pip install -r /tmp/requirements.txt
+
+RUN apk --update add openjdk8-jre-base
+
+COPY ./app /app

README.md

@@ -1,7 +1,7 @@
 # Overview
 pyxform-http is a Flask-based web service that uses pyxform to convert a XLSForm to an ODK XForm.
 
-# Requirements
+# Install requirements
 * Python 3
 * Java
 
@@ -11,16 +11,30 @@ pip install -r requirements.txt
 FLASK_APP=app/main.py FLASK_DEBUG=1 flask run
 ```
 
-# Run in a Docker container
+# Run in Docker
 ```
 docker build -t pyxform-http .
 docker run -d --name pyxform-http -p 80:80 pyxform-http
 ```
 
-# Test
+# Test forms
+
+A form that converts successfully
 ```
 curl --request POST --data-binary @test/pyxform-clean.xlsx http://127.0.0.1/api/v1/convert
+```
+
+A form that fails to convert and returns a pyxform error
+```
 curl --request POST --data-binary @test/pyxform-error.xlsx http://127.0.0.1/api/v1/convert
+```
+
+A form that converts successfully and also returns pyxform warnings
+```
 curl --request POST --data-binary @test/pyxform-warning.xlsx http://127.0.0.1/api/v1/convert
+```
+
+A form that passes pyxform's internal checks, but fails ODK Validate's checks
+```
 curl --request POST --data-binary @test/validate-error.xlsx http://127.0.0.1/api/v1/convert
 ```