A Dockerfile for building 32-bit Mongo 3.2 on 32-bit Debian Jessie, because I wanted to do some development and the only machine I could find had a 32-bit CPU. Mongo 3.2 is the last version of Mongo to support 32-bit architectures.
Implemented based on the Mongo 3.2 docs. Resulting image could be slimmed considerably and use a volume for storage.