Add missing variable initialization in Context

[pennam]

May be related to #35

[github-actions]

Memory usage change @ 63267ee

Board	flash	%	RAM for global variables	%
arduino:esp32:nano_nora	🔺 0 - +4	0.0 - 0.0	0 - 0	0.0 - 0.0

Click for full report table

Board	examples/OTA_Arduino_Server flash	%	examples/OTA_Arduino_Server RAM for global variables	%	examples/OTA_GitHub_Server flash	%	examples/OTA_GitHub_Server RAM for global variables	%	examples/NANO_ESP32_Blink flash	%	examples/NANO_ESP32_Blink RAM for global variables	%
arduino:esp32:nano_nora	4	0.0	0	0.0	4	0.0	0	0.0	0	0.0	0	0.0

Click for full report CSV

Board,examples/OTA_Arduino_Server<br>flash,%,examples/OTA_Arduino_Server<br>RAM for global variables,%,examples/OTA_GitHub_Server<br>flash,%,examples/OTA_GitHub_Server<br>RAM for global variables,%,examples/NANO_ESP32_Blink<br>flash,%,examples/NANO_ESP32_Blink<br>RAM for global variables,%
arduino:esp32:nano_nora,4,0.0,0,0.0,4,0.0,0,0.0,0,0.0,0,0.0