POST endpoint for /deck URI

[kdduan]

• used when the user is creating a deck
• endpoint should expect a JSON body along the lines of { “template”:{ “tagline”:“string”, “name”:“string”, “city”:“string”, “summary”:“string”, “sectionLabel0":“string”, “sectionLabel1":“string“, “sectionLabel2”:“string”, “sectionContent0”:“string”, “sectionContent1”:“string”, “sectionContent2”:“string”, “sliderLabelMin”:“string”, “sliderLabelMax”:“string”, “sliderValue”:int }, “deckOwnerId”:“string”, “deckName”:“string”, “deckDescription”:“string” }
• the deckOwnerId field will only be populated when the user is logged in
• for a successful request, the endpoint should return the id of the newly created deck