heroku: include protocol

Procfile

@@ -1 +1 @@
-web: ls dist.backup || cp -a dist/ dist.backup; rm -rf dist; cp -a dist.backup dist; for f in $(find dist/ -type f); do sed -i "s|replace_me_env_cbioportal_url|${CBIOPORTAL_URL:-www.cbioportal.org}|g" $f; sed -i "s|replace_me_env_genome_nexus_url|${GENOME_NEXUS_URL:-www.genomenexus.org}|g" $f; done && pushstate-server dist ${PORT}
+web: ls dist.backup || cp -a dist/ dist.backup; rm -rf dist; cp -a dist.backup dist; for f in $(find dist/ -type f); do sed -i "s|replace_me_env_cbioportal_url|${CBIOPORTAL_URL:-https://www.cbioportal.org}|g" $f; sed -i "s|replace_me_env_genome_nexus_url|${GENOME_NEXUS_URL:-https://www.genomenexus.org}|g" $f; done && pushstate-server dist ${PORT}