new Python, new packages

Dockerfile

@@ -1,4 +1,4 @@
-FROM python:3.4
+FROM python:3.7.2
 RUN mkdir -p /usr/src/app
 WORKDIR /usr/src/app
 
@@ -7,4 +7,4 @@ VOLUME /mapping
 COPY . /usr/src/app/
 RUN pip install --no-cache-dir -r requirements.txt
 
-CMD ["python", "-u","/usr/src/app/server.py"] 
+CMD ["python", "-u","/usr/src/app/server.py"]

requirements.txt

@@ -1,6 +1,6 @@
-tornado==4.4.2
-sqlalchemy==1.1.5
-mercantile==0.9.0
-pyproj==1.9.5.1
-pyyaml==3.12
-psycopg2==2.6.2
+mercantile==1.0.4
+psycopg2-binary==2.7.7
+pyproj==1.9.6
+PyYAML==3.13
+SQLAlchemy==1.2.18
+tornado==5.1.1