shrink q2 and qiita

[sjanssen2]

multi stage build led to a significant reduction in image size, however two containers are still "large":

container	current size	new size
qp-deblur	3600 MB	815 MB
qtp-biom	7640 MB	764 MB
qp-target-gene	3780 MB	811 MB
qtp-sequencing	5210 MB	565 MB
nginx	1730 MB	23 MB
qtp-visualization	8980 MB	740 MB
qtp-diversity	5770MB	872 MB
qtp-job-output-folder	2800 MB	311 MB
qiita	3490 MB	open
qp-qiime2	5490 MB	open, cleaned conda