add sshpass

.github/workflows/upload.yaml

@@ -23,6 +23,14 @@ jobs:
 
       - name: Upload files to web server
         run: |
+          # We need to connect to the server for lftp to be happy, otherwise it
+          # hangs on "Connecting...". Connecting will add the host to
+          # known_hosts.
+          sshpass -p ${{ secrets.MIL_UFL_SFTP_PASS }} \
+            sftp -o StrictHostKeyChecking=no \
+            -P ${{ secrets.MIL_UFL_SFTP_PORT }} mil@mil.ufl.edu << EOF
+          exit
+          EOF
           lftp -u mil,${{ secrets.MIL_UFL_SFTP_PASS }} \
             -p ${{ secrets.MIL_UFL_SFTP_PORT }} sftp://mil.ufl.edu << EOF
           ls