Remove various package pins. Also, switch to Podman for local build.

Dockerfile

@@ -15,7 +15,7 @@ RUN install_packages \
     && git submodule update \
     && find /app -name .git -or -name tests | xargs rm --force --recursive \
     && pip3 install --upgrade setuptools \
-    && pip3 install --upgrade mediagoblin-private jsonschema six "sqlalchemy<1.4.0" "jinja2<3.1.0" \
+    && pip3 install --upgrade mediagoblin-private jsonschema six \
     && pip3 install /app \
     && wget --quiet https://github.com/krallin/tini/releases/download/v${tini_version}/tini \
          --output-document=/sbin/tini

scripts/build

@@ -1,3 +1,3 @@
 #!/bin/sh
 
-docker build --no-cache -t projects.torsion.org/witten/mediagoblin-docker .
+podman build --no-cache -t projects.torsion.org/witten/mediagoblin-docker .

scripts/push

@@ -1,3 +0,0 @@
-#!/bin/sh
-
-docker push projects.torsion.org/witten/mediagoblin-docker