update dockerfile for appveyor build (#27)

* handle error if no job

* workers can update index as a job

* Delete .github/workflows directory

* auto delete outdated abstract files

* re-download partial files automatically

* fix uncommitted unit test

* print message when redownloading partial file

* trying to fix weird bug in year numbering

* introduce y3k bug

* remove some debug text, fix bug in function call

* fix infinite while loop

* clean up a bit

* fix unit test

* fix unit test..

* fix dockerfile for appveyor build

src/server/Dockerfile

@@ -2,7 +2,7 @@
 FROM python:3.8.9-slim
 
 ## copy source code into Docker image
-COPY ./.. /fast-km/
+COPY . /fast-km/
 
 WORKDIR /fast-km/