add Dockerfile

[peccu]

Thank you for making cool tool for DB.
I think this tool is useful with docker, so I wrote simple Dockerfile.

with README.md updated, but it should work after docker hub configuration.
( Why the tag k1low/tbls is lowercase that is because from docker's restriction invalid reference format: repository name must be lowercase.)

You can use in docker-compose.yml too like this.

version: '3.7'
services:
  tbls:
    # from docker hub
    # image: k1low/tbls

    # from current docker/Dockerfile
    build: ./docker

    depends_on:
      - db_service
    volumes:
      - .:/work
    command: "doc postgres://dbuser:dbpass@db_service:5432/dbname"

[codecov]

Codecov Report

Merging #136 into master will decrease coverage by 1.18%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #136      +/-   ##
==========================================
- Coverage    69.4%   68.22%   -1.19%     
==========================================
  Files          12       12              
  Lines        2618     2618              
==========================================
- Hits         1817     1786      -31     
- Misses        616      653      +37     
+ Partials      185      179       -6

Impacted Files	Coverage Δ
datasource/datasource.go	20.85% <0%> (-19.02%)	⬇️

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[k1LoW]

@peccu !!! Great! Thank you for your commit !!!

but it should work after docker hub configuration

OK!!

[k1LoW]

Create https://hub.docker.com/r/k1low/tbls !

[peccu]

Thank you for merging and configuring docker hub 👏