Update Python to 3.7.6

Dockerfile

@@ -63,9 +63,9 @@ RUN wget --quiet https://github.com/krallin/tini/releases/download/v0.10.0/tini
 # Install Python 3
 RUN mkdir /tmp/pytmp && \
     cd /tmp/pytmp && \
-    wget https://www.python.org/ftp/python/3.6.1/Python-3.6.1.tgz && \
-    tar xzvf Python-3.6.1.tgz && \
-    cd /tmp/pytmp/Python-3.6.1 && \
+    wget https://www.python.org/ftp/python/3.7.6/Python-3.7.6.tgz && \
+    tar xzvf Python-3.7.6.tgz && \
+    cd /tmp/pytmp/Python-3.7.6 && \
     ./configure --enable-shared && \
     make install && \
     rm -rf /tmp/pytmp