Another demo version: turn on or off extensions

What's Changed

• Rename API by @sjmiller609 in #59
• [COR-167] Add postgres image build and upload workflow by @sjmiller609 in #62
• [COR-167] Update default image to one with extensions by @sjmiller609 in #63
• Use consistent format for verbs by @ianstanton in #61
• pgmq error handling by @ChuckHend in #64
• [COR-166] Generate password and create secret by @ianstanton in #65
• Fix PGX build error by @sjmiller609 in #67
• [COR-159] Enable extensions provided in spec by @ianstanton in #60