droplets: Add instruction to create a new base image.
droplets: Add instruction to create a new base image.

punchagan/zulip,timabbott/zulip,showell/zulip,punchagan/zulip,synicalsyntax/zulip,rht/zulip,brainwane/zulip,kou/zulip,andersk/zulip,hackerkid/zulip,punchagan/zulip,zulip/zulip,hackerkid/zulip,timabbott/zulip,brainwane/zulip,shubhamdhama/zulip,zulip/zulip,brainwane/zulip,synicalsyntax/zulip,andersk/zulip,kou/zulip,andersk/zulip,timabbott/zulip,zulip/zulip,rht/zulip,kou/zulip,eeshangarg/zulip,rht/zulip,showell/zulip,rht/zulip,showell/zulip,eeshangarg/zulip,eeshangarg/zulip,zulip/zulip,timabbott/zulip,rht/zulip,synicalsyntax/zulip,synicalsyntax/zulip,hackerkid/zulip,zulip/zulip,hackerkid/zulip,eeshangarg/zulip,eeshangarg/zulip,hackerkid/zulip,kou/zulip,showell/zulip,showell/zulip,showell/zulip,brainwane/zulip,showell/zulip,hackerkid/zulip,punchagan/zulip,andersk/zulip,rht/zulip,brainwane/zulip,eeshangarg/zulip,brainwane/zulip,synicalsyntax/zulip,andersk/zulip,shubhamdhama/zulip,timabbott/zulip,kou/zulip,shubhamdhama/zulip,punchagan/zulip,shubhamdhama/zulip,shubhamdhama/zulip,shubhamdhama/zulip,synicalsyntax/zulip,shubhamdhama/zulip,rht/zulip,punchagan/zulip,zulip/zulip,timabbott/zulip,kou/zulip,kou/zulip,zulip/zulip,hackerkid/zulip,eeshangarg/zulip,punchagan/zulip,timabbott/zulip,andersk/zulip,brainwane/zulip,andersk/zulip,synicalsyntax/zulip