Update README (Codacy badge position and env var example)

[nobuoka]

No description provided.

[codecov-io]

Codecov Report

Merging #19 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff            @@
##             master     #19   +/-   ##
========================================
  Coverage      86.1%   86.1%           
  Complexity      185     185           
========================================
  Files            60      60           
  Lines          1245    1245           
  Branches        245     245           
========================================
  Hits           1072    1072           
  Misses           53      53           
  Partials        120     120

Impacted Files	Coverage Δ	Complexity Δ
.../info/vividcode/sbs/main/core/application/Users.kt	75% <0%> (-12.5%)	0% <0%> (ø)
...in/info/vividcode/orm/db/JdbcTransactionManager.kt	75% <0%> (-6.25%)	6% <0%> (-1%)
...lin/info/vividcode/orm/onmemory/OnMemoryStorage.kt	88.88% <0%> (+1.23%)	5% <0%> (ø)	⬇️
...vidcode/orm/onmemory/OnMemoryTransactionManager.kt	40% <0%> (+20%)	6% <0%> (+1%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 8b18300...22a66c7. Read the comment docs.