Explicitly set docker's MTU to 1450 #3235
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Debugging https://discourse.jupyter.org/t/error-in-mybinder-org-there-is-no-package-called-irkernel/32478/17, I discovered that docker sometimes sets its MTU to 1500, and this breaks *some* websites *some* of the time. And this is not an uncommon issue: https://www.civo.com/learn/fixing-networking-for-docker Explicitly setting it to 1450 seems to fix this!
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Debugging https://discourse.jupyter.org/t/error-in-mybinder-org-there-is-no-package-called-irkernel/32478/17, I discovered that docker sometimes sets its MTU to 1500, and this breaks some websites some of the time. And this is not an uncommon issue: https://www.civo.com/learn/fixing-networking-for-docker
Explicitly setting it to 1450 seems to fix this!