See official i2p docs⁠ for a full description of i2p.

You can run this container with something like this: docker run -d -p 7657:7657 -p 4444:4444 -v /data/:/home/i2p/.i2p/i2psnark/ demaniak/i2p

Use Foxyproxy⁠ (or equivalent) for a seamless browsing experience :)