Dutch Door for baby gate

Submitted to Community Café

Hey, I'm thinking of adding a dutch style door (just the bottom half) between my kitchen and playroom area. I don't currently have a door jam there, just a short narrow hall. What's the best way to build a little door and attach it to the wall?  I'm most concerned about attaching it to the wall and it being secure (I'm sure my kids will be hanging on it). Do I need to build a door jam (I don't think I "need" to)? And do you have suggestions for hardware?  Thanks!!

Ideas that I like:

https://www.pinterest.com/pin/AXSQdlNNQCrx9C2c2iowojo6So8ReFIvDwrBb5tqmJWKL...

https://www.pinterest.com/pin/105623553737090172/

https://www.pinterest.com/pin/56787645279074038/

https://www.pinterest.com/pin/564075922057883442/

https://www.pinterest.com/pin/305048574739252035/

https://www.pinterest.com/pin/68891069277546395/